Turntables are available in different sizes based upon the application. Large diameter car turntables equalize wheel wear due to prevailing track system curves by rotating the entire car 180°.Turntables are also available to rotate a single truck in 90° increments. These can be either manual or motorized in their rotation. Both ball bearing and caster designs have been in use for many years. Recently designed car shops utilize a truck turntable on each service track between car hoists. This arrangement allows selective change out of any truck regardless of its position. Whiting turntables are extremely rugged and balanced, and are especially suitable for metro service. Whiting's engineering/manufacturing capabilities cover the “total turntable requirement" everything from large diameter, 250-ton outdoor units to relatively small “in-shop” truck maintenance tables. All are normally supplied as complete packages including drive and control equipment. All are designed and manufactured to the highest levels of quality and performance utilizing the most advanced technologies.